UA 568 then AA 622 at DFW
Denver → Dallas-Fort Worth → Milwaukee
Timetable, Dallas-Fort Worth time
12:44UA 568 from Denver at the gate
09:30AA 622 to Milwaukee leaves the gate
20 h 46 apart on the timetable, overnight
AA 622 leaves 20 h 46 after UA 568 arrives on the timetable: more than half a day, so not a connection we count.